Vehicle-jack.



Patented Oct. 1, 1912.

A TTURNYS B. P. LIDDON.'

VEHICLE JACK.

APPLIoATIoN FILED 11110.29, 1911.

W/TNESSES gf( BENJAMIN F. LIDDON, 0F CORINTH,'MISSISSIPPI.

VEHICLE-JACK.

Specication 4of Letters Patent.

Patented Oct. 1, 1912.

Application filed December 29, 1911. Serial No. 668,394.

To all whom 'it may concern:

Be it known that I, BENJAMIN F. LIDDON, a citizen of the United States, and a resident of Corinth, in the county of Alcorn and State of Mississippi,lhave invented an Improvement in Vehicle-Jacks, of Ywhich the following is a specification.

My invention is an automatic jack for axles of-automobiles and other wheeled vehicles, the same having a rocker body to which is pivoted an axle-supporting bar adapted to automatically engage an axleI when a vehicle is run over the jack.

, posed front and rear pieces 2 and 3. All the parts are preferably constructed of wood, although other material may be used. The side pieces 1 are formed of planks or thick boards, which are spaced a few inches apart, the front and rear pieces 2 and 3 being interposed and secured by nails, screws or other suitable means. The sides 1 are constructed `as rockers, the front portion being ,curved upward and the rear portion being straight, so that it is adapted to rest dat on a floor or other level surface.

Anaxle-engaging and -supporting bar 4 is pivoted between the sides 1 at a oint above the bottom thereof and about mi way of the rear portion. The pivot may consist of a stout rod 5 extendin through the sides land axle-support 4, an the same is ada ted for vertical adjustment by means of ho es 6 formed in the side pieces 1, as illustrated in Fig. 2. In other words, this construction adapts the bar 4 to be raised or lowered to accommodate high or low automobiles.

The front piece 2, before referred to, is inclined at an angle lof about 45 and extends upward and rearward to a point where it is adapted to engage the axle-support 4 when in working position shown by full lines in Fig. 1. In other words, the part 2 serves as a stop or abutment for the bar 4, which, it will be noted, is pivoted eccentrically as regards the point of su port on which the automobile axle rests. wing to this arrangement of the pivot, it is obvious that the bar 4. bears against the stop 2 with a pressure suicient to oii'setk the tendency to rock backward when an automobile is supported on the bar. Yet the eccentricity of the pivot is so slight that it requires but sli ht pressure to push the automobile back an thus free it from the support. The rear side ofthe bar 4 is provided with a triangular block 4 which2 when the bar is thrown back to the position indicated by dotted lines in Fig. 1 and full lines in Fig. 2, Yengages the rear cross-piece 3.

It will be apparent that, when placed in the inclined position indicated, and an automobile is run over the jack, the axle :c of the auto, upon striking the recessed head of the bar 4, will be automatically raised to the position shown by full lines in Fig. 1, and that in such case the swing of the bar with the Weight of the automobile applied will be arrested by the stop 2 and without serious shockor jar, since the impetus or momentum will be taken up by the adaptation of the jack to rock on its front curved portion; whereas, without this adaptation of the jack to rock forward, the shock or jar might be in many cases too violent for safety.

To prevent creeping or a possible for ward movement of the jack on the floor or other base, I preferably provide it with a stop-pin 7 which projects from the rocker at the point adjacent to the junction of its curved and straight edges, and is adapted to project into a hole or socket in the fioor. Two jacks may be used for a single vehicle axle and made entirely disconnected or independent of each other; or two jacks may be rigidly connected, so as to operate as one, by a cross bar 8 extending between and s ecured to their rear portions, as shown in Fig. 2.

What I claim is :--L

1. In an automatic jack, the combination with a body ortion formed of parallel side portions and) interposed front and rear pieces, of an axle-engaging and supporting bar pivoted between the sides and adapted to swing forward and back and having ya triangular piece secured to its rear side and adapted to engage the rear cross piece, substantially as described.

2. The improved automatic jack, comprisf ing a body having its base portion constructand adapted to engage the bar When swung ed upon curved and stra-ight lines to form a to a, vertical position, substantially as del'ocker and provided With a stop arranged scribed.

adjacent to the junction of the curved and BENJAMIN F. LIDDN. straight lines, a swinging bar pivoted to the Witnesses:

body and adapted to engage and support an JMES F. GIsH.,

axle, and a stop rigidly secured to the body GEORGE C. TAYLORu 

